1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <dlfcn.h>
18
19 #include "chre/platform/assert.h"
20 #include "chre/platform/log.h"
21 #include "chre/platform/shared/nanoapp_loader.h"
22 #include "chre/util/unique_ptr.h"
23
dlopenbuf(void * elfBinary,bool mapIntoTcm)24 void *dlopenbuf(void *elfBinary, bool mapIntoTcm) {
25 return chre::NanoappLoader::create(elfBinary, mapIntoTcm);
26 }
27
dlsym(void * handle,const char * symbol)28 void *dlsym(void *handle, const char *symbol) {
29 LOGV("Attempting to find %s", symbol);
30
31 void *resolvedSymbol = nullptr;
32 if (handle == RTLD_NEXT) {
33 resolvedSymbol = chre::NanoappLoader::findExportedSymbol(symbol);
34 } else if (handle != nullptr) {
35 auto *loader = reinterpret_cast<chre::NanoappLoader *>(handle);
36 resolvedSymbol = loader->findSymbolByName(symbol);
37 }
38
39 if (resolvedSymbol == nullptr) {
40 LOGE("dlsym unable to resolve %s", symbol);
41 } else {
42 LOGV("Found symbol at %p", resolvedSymbol);
43 }
44
45 return resolvedSymbol;
46 }
47
dlclose(void * handle)48 int dlclose(void *handle) {
49 int rv = -1;
50
51 if (handle != nullptr) {
52 chre::NanoappLoader::destroy(static_cast<chre::NanoappLoader *>(handle));
53 rv = 0;
54 }
55
56 return rv;
57 }
58
dlerror()59 const char *dlerror() {
60 return "Shared library load failed";
61 }
62